"use strict";
layui.define(["layer"], function (exprots) {
    var $ = layui.jquery;

    /**
     * 金额管理
     */
    var Amount = {
        /**
         * 转换为中文
         * @param currencyDigits 数值金额
         * @returns {string}
         */
        convertCurrency: function (currencyDigits) {
            // Constants:
            var MAXIMUM_NUMBER = 99999999999.99;
            // Predefine the radix characters and currency symbols for output:
            var CN_ZERO = "零";
            var CN_ONE = "壹";
            var CN_TWO = "贰";
            var CN_THREE = "叁";
            var CN_FOUR = "肆";
            var CN_FIVE = "伍";
            var CN_SIX = "陆";
            var CN_SEVEN = "柒";
            var CN_EIGHT = "捌";
            var CN_NINE = "玖";
            var CN_TEN = "拾";
            var CN_HUNDRED = "佰";
            var CN_THOUSAND = "仟";
            var CN_TEN_THOUSAND = "万";
            var CN_HUNDRED_MILLION = "亿";
            var CN_SYMBOL = "人民币";
            var CN_DOLLAR = "元";
            var CN_TEN_CENT = "角";
            var CN_CENT = "分";
            var CN_INTEGER = "整";

            // Variables:
            var integral; // Represent integral part of digit number.
            var decimal; // Represent decimal part of digit number.
            var outputCharacters; // The output result.
            var parts;
            var digits, radices, bigRadices, decimals;
            var zeroCount;
            var i, p, d;
            var quotient, modulus;

            // Validate input string:
            currencyDigits = currencyDigits.toString();
            if (currencyDigits == "") {
                // alert("Empty input!");
                return "";
            }
            if (currencyDigits.match(/[^,.\d]/) != null) {
                // alert("Invalid characters in the input string!");
                return "";
            }
            if ((currencyDigits)
                .match(/^((\d{1,3}(,\d{3})*(.((\d{3},)*\d{1,3}))?)|(\d+(.\d+)?))$/) == null) {
                // alert("Illegal format of digit number!");
                return "";
            }

            // Normalize the format of input digits:
            currencyDigits = currencyDigits.replace(/,/g, ""); // Remove comma
            // delimiters.
            currencyDigits = currencyDigits.replace(/^0+/, ""); // Trim zeros at the
                                                                // beginning.
            // Assert the number is not greater than the maximum number.
            if (Number(currencyDigits) > MAXIMUM_NUMBER) {
                alert("您输入的金额太大，请重新输入!");
                return "";
            }

            // Process the coversion from currency digits to characters:
            // Separate integral and decimal parts before processing coversion:
            parts = currencyDigits.split(".");
            if (parts.length > 1) {
                integral = parts[0];
                decimal = parts[1];
                // Cut down redundant decimal digits that are after the second.
                decimal = decimal.substr(0, 2);
            } else {
                integral = parts[0];
                decimal = "";
            }
            // Prepare the characters corresponding to the digits:
            digits = new Array(CN_ZERO, CN_ONE, CN_TWO, CN_THREE, CN_FOUR, CN_FIVE,
                CN_SIX, CN_SEVEN, CN_EIGHT, CN_NINE);
            radices = new Array("", CN_TEN, CN_HUNDRED, CN_THOUSAND);
            bigRadices = new Array("", CN_TEN_THOUSAND, CN_HUNDRED_MILLION);
            decimals = new Array(CN_TEN_CENT, CN_CENT);
            // Start processing:
            outputCharacters = "";
            // Process integral part if it is larger than 0:
            if (Number(integral) > 0) {
                zeroCount = 0;
                for (i = 0; i < integral.length; i++) {
                    p = integral.length - i - 1;
                    d = integral.substr(i, 1);
                    quotient = p / 4;
                    modulus = p % 4;
                    if (d == "0") {
                        zeroCount++;
                    } else {
                        if (zeroCount > 0) {
                            outputCharacters += digits[0];
                        }
                        zeroCount = 0;
                        outputCharacters += digits[Number(d)] + radices[modulus];
                    }
                    if (modulus == 0 && zeroCount < 4) {
                        outputCharacters += bigRadices[quotient];
                    }
                }
                outputCharacters += CN_DOLLAR;
            }
            // Process decimal part if there is:
            if (decimal != "") {
                for (i = 0; i < decimal.length; i++) {
                    d = decimal.substr(i, 1);
                    if (d != "0") {
                        outputCharacters += digits[Number(d)] + decimals[i];
                    }
                }
            }
            // Confirm and return the final output string:
            if (outputCharacters == "") {
                outputCharacters = CN_ZERO + CN_DOLLAR;
            }
            if (decimal == "") {
                outputCharacters += CN_INTEGER;
            }
            outputCharacters = CN_SYMBOL + outputCharacters;
            return outputCharacters;
        }
    };

    exprots("Amount", Amount);
});
